Patent attributes
A dual-mode stereoscopic three-dimensional (3D) projection display with two micro-display panels is provided. In a passive 3D mode, the 3D projection display simultaneously projects left-eye and right-eye images with first and second polarizations on the screen. The first and second polarizations are orthogonal to each other. In a first passive mode, a polarization-preserving screen is used and passive polarizing glasses can be worn to see the 3D images. In a second passive mode, an ordinary screen is used and 3D color filter glasses can be worn to see the 3D images. In an active mode, the display projects left-eye and right-eye images, with both first and second polarizations, time-sequentially and liquid crystal shutter glasses synchronized with the image sources can be worn to see 3D images. The dual-mode 3D projection display can be switched electronically to project 2D images when the same 2D image signals are fed to both micro-display panels. The dual-mode 3D projection display is more light efficient than conventional single panel projection displays because at any given time, at least two primary colors are displayed on screen with orthogonal polarizations.
